I remember this thread too from a while back. It's possible that my memory transposed some hasselblad lens onto his canon lenses but I'm pretty sure there is another similar thread out there somewhere with a hasselblad and an actual comparison of the image centers. http://photo.net/alternative-cameras-forum/00U5Ts
A comment in that thread compares rollei and holga but he's probably lying through his teeth too. The nerve of us people.